/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2022 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "led.h"
#include "key.h"
#include "exti.h"
#include "usart.h"
#include "stdio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
// void SystemClock_Config(void);
void Stm32_Clock_Init(uint32_t);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/*to redirect printf to uart with semihosting.*/
int _write(int fd, char* ptr, int len) {
    HAL_UART_Transmit(&UART1_Handler, (uint8_t *) ptr, len, HAL_MAX_DELAY);
    return len;
}

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  // char* tran_test = "abc";

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  Stm32_Clock_Init(RCC_PLL_MUL9);
  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  /* USER CODE BEGIN 2 */
  LED_Init();
  KEY_Init();
  EXTI_Init();
  uart_init(115200);
  /* enable this if you do not want to wait for \n to send a line. */
  /* setvbuf(stdout, NULL, _IONBF, 0); */
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  int i = 0;

  while (1)
  {
    /* USER CODE END WHILE */
    if (HAL_GPIO_ReadPin(GPIOE, GPIO_PIN_4) == GPIO_PIN_RESET)   //KEY0
    {
      HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);
      HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_SET);
      HAL_Delay(500);
    }
    else if (HAL_GPIO_ReadPin(GPIOE, GPIO_PIN_3) == GPIO_PIN_RESET)  //KEY1
    {
      HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET); 
      HAL_GPIO_WritePin(GPIOE, GPIO_PIN_5, GPIO_PIN_RESET);
      HAL_Delay(500);
    }
    else
    {
      HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5, GPIO_PIN_RESET);
      HAL_GPIO_WritePin(GPIOE,GPIO_PIN_5, GPIO_PIN_SET);
      HAL_Delay(500);
      HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5, GPIO_PIN_SET);
      HAL_GPIO_WritePin(GPIOE,GPIO_PIN_5, GPIO_PIN_RESET);
/*      HAL_UART_Transmit(&UART1_Handler, (uint8_t*)"tran_test", 9, 1000);  */
      HAL_Delay(500);
      printf("abc:%d\n", i++);
    }

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

void Stm32_Clock_Init(uint32_t pll)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0}; 
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = pll;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
      Error_Handler();
    }
    
    RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
      Error_Handler();
    }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
